Lots of PASE converted games in disk format here (Dominique's old pages):http://dominique.pessan.pagesperso-oran ... ystick.htm
Beware that those disks may be slave disks, i.e Sedoric without operating system on them. If so, you need to boot first on a Sedoric master disk, then inster those disks (or better, leave Sedoric in drive A, and insert games disks in drive B).

IJK and Altai: no idea sorry (not sure I have ever seen an Altai interface BTW?)

What you call a "slot" has a different meaning. It refers to different communication modes between the Arduino and Oric.
(In effect, I emulate legacy joystick interfaces. The code for reading joysticks inside the arduino is the same).

I started cleaning up the mess of wires, and soldering some DB9 connectors... I will post another update video this week-end.
The concept as it has evolved up-to now is summarized in the picture below.

One is for me, the others are for 3 early adopters, willing to help me with testing 8bit-slicks and 8bit-Unity for the Oric (As bonus, you will also benefit from the IJK/PASE interface). I would like to charge between 100-150 GBP per unit + shipping cost (this is a bargain when you consider the amount of soldering I will have to do on each unit).

P.S: One caveat is that the joysticks need to be "low resistance type" (less than 100 ohm, like like this one). The internal resistance on some Atari, Tack 2, and Amstrad joystick switches I checked is so random (some switches <100 ohm, others >10K ohm) that it messes up the voltage divider... I will try to address this issue in future...

The communication code will be released open-source, as part of my 8bit-Unity SDK (written for cc65, but the communication code can be picked-up and integrated into any other project such as OSDK or pure ASM).

So far I have released 8bit-Slicks for free, will release 8bit-Unity for free (the code for both hosted on GitHub). But for the 8bit-Hub, I will first try to talk to some specialized manufacturers like Lotharek or iComp, to see if they are interested in selling the unit. This may ensure a bigger impact than releasing the design as open-source and seeing only a couple dozen people ever assembling it...